Coding &amp; STEM Tools

Free block-based programming platform and online community for creating interactive stories, games, and animations.

GeoGebra

Free math platform combining graphing, geometry, algebra, statistics, calculus, and classroom resources in one ecosystem.

Snap!

Advanced blocks-based programming language from UC Berkeley for teaching real computer science concepts beyond beginner block coding.

Thunkable

Thunkable is a no-code app builder for designing, building, and publishing native mobile and web apps without coding.

Desmos

Free graphing and math activity platform with graphing, geometry, 3D, and classroom tools for visual math learning.

PhET Interactive Simulations

Research-based interactive science and math simulations for exploring STEM concepts through virtual experiments.

Blockly

Open-source blocks-based programming library for building custom visual coding editors and educational coding experiences.

Mathletics

Paid English

Curriculum-aligned online math program with adaptive practice, games, challenges, and teacher reporting for school or home use.

Tinkercad

Free Autodesk web app for beginner-friendly 3D design, electronics simulation, and coding-based STEM projects.

Replit

AI app-building platform for creating, deploying, and iterating on web apps, sites, and software projects directly from the browser.

CodePen

Front-end development playground and social coding environment for HTML, CSS, JavaScript, live previews, and sharable experiments.

Tynker

Coding education platform for kids with block coding, Python, JavaScript, game creation, Minecraft, robotics, and STEM pathways.

Trinket

Education-focused browser coding environment for Python, HTML, and shareable interactive code, but scheduled to shut down in early August 2026.

StackBlitz

Browser IDE powered by WebContainers for running full-stack JavaScript and Node workflows without traditional local setup.

JSFiddle

Classic browser code playground for HTML, CSS, and JavaScript snippets, demos, experiments, and bug reproductions.

CodeSandbox

Cloud development platform for full-stack web projects, rapid prototyping, collaboration, and shareable dev environments.

Code.org

Free K–12 computer science and AI education platform with tutorials, curriculum, hands-on projects, and teacher professional development.

Scratch Jr

Introductory coding app for ages 5-7 that teaches sequencing and logic through animated stories and games.

SoloLearn

Freemium Multi-language

SoloLearn is an interactive coding learning platform with bite-size courses, hands-on practice, and a large learner community.

Overleaf

Freemium Multi-language

Overleaf is an online LaTeX editor for academic and technical writing with real-time collaboration, templates, and version control.

MIT App Inventor

Visual block-programming environment from MIT for building mobile apps in the browser, especially for beginners and classrooms.

Wolfram Alpha

Computational knowledge engine for math, science, data, and step-by-step problem solving using natural language input.

Codewars

Codewars is a coding practice platform where developers improve by solving community-made kata in many programming languages.

CS First

CS First was Google's beginner K-12 computer science program, but Google officially shut it down on June 30, 2025.

Glitch

Former collaborative web coding and hosting platform; now mainly a legacy reference after shutdown of hosting and core service access.

Mystery Science

Open-and-go K-5 science lessons with guided videos, hands-on activities, and standards-aligned planning support.

p5.js Web Editor

The p5.js Web Editor is a browser coding environment for learning JavaScript through creative coding, art, animation, and interaction.

Microsoft MakeCode

Microsoft MakeCode is a free learn-to-code platform for building games, coding hardware, and beginner programming projects.

regex101

regex101 is a regex tester and debugger with syntax highlighting, explanations, library examples, and multi-engine support.

JSON Formatter

JSON Formatter is an online tool for formatting, validating, viewing, converting, and debugging JSON data quickly.

Observable